Great question. We want you to be able to enjoy your phone fully. As of currently we do not have an exact release date for the software update for the Moto X. You can keep up to date here... http://bit.ly/n5snpq
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Blame Motorola for not having the ability to have 2 antennas working at the same time. You do realize you will only be able to talk and use data if you're doing a HD Voice call which means the other person has to have a device that is Advanced Calling capable and enabled. And of course in a 4G area.
Fortunately, you're completely wrong about the simultaneous voice and data part. VoLTE will enable simultaneous voice and data no matter who you're calling. I won't go into detail, but read more about how this stuff works and you'll see.
Now, the WHEN is what we really need for the Moto X!!! Haha.
Let's educate ourselves.
If you aren't able to make or receive an HD Voice call, it may be due to one of the following reasons:
Now "HD Voice" is just Verizon term for VoLTE. Well this FAQ clearly says if the other person doesn't have HD Voice you won't be making a "HD Voice( thus VoLTE) call. If you're not making a VoLTE call you're using the CDMA network. Or....... the person that wrote Verizon's FAQ on this topic is wrong.
[Fortunately, you're completely wrong about the simultaneous voice and data part. VoLTE will enable simultaneous voice and data no matter who you're calling. I won't go into detail, but read more about how this stuff works and you'll see.] For you reading pleasure: Advanced Calling FAQs | Verizon Wireless mrhelper is giving you the correct information on this feature.
HD voice only pertains to the call being on both ends VoLTE is used all the time. I have a droid turbo when I make standard call in an LTE area it to a land line, I have voice and data